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Finding the Fourth Proportional to 1,993.51, 2,990.86 and 1,439.47

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Solution

The fourth proportional to 1,993.51, 2,990.86 and 1,439.47 is: 2,159.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993.51 : 2,990.86 = 1,439.47 : x
  2. Step 2: Convert to fraction form
    1,993.51/2,990.86 = 1,439.47/x
  3. Step 3: Cross multiply
    1,993.51x = 2,990.86 × 1,439.47
  4. Step 4: Simplify right side
    1,993.51x = 4,305,238.29
  5. Step 5: Solve for x
    x = 4,305,238.29/1,993.51
  6. Step 6: Final answer
    x = 2,159.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.